DE102011085368A1 - Rechargeable battery pack has electrical backup portion that is provided in conductive connection portion which is provided between trunk lines of series circuits provided with two battery cells that are connected over trunk line - Google Patents

Rechargeable battery pack has electrical backup portion that is provided in conductive connection portion which is provided between trunk lines of series circuits provided with two battery cells that are connected over trunk line Download PDF

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Publication number
DE102011085368A1
DE102011085368A1 DE102011085368A DE102011085368A DE102011085368A1 DE 102011085368 A1 DE102011085368 A1 DE 102011085368A1 DE 102011085368 A DE102011085368 A DE 102011085368A DE 102011085368 A DE102011085368 A DE 102011085368A DE 102011085368 A1 DE102011085368 A1 DE 102011085368A1
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Germany
Prior art keywords
fuse
battery pack
series circuits
conductive connection
battery cells
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DE102011085368A
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German (de)
Inventor
Rainer Glauning
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Robert Bosch GmbH
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Robert Bosch GmbH
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Priority to DE102011085368A priority Critical patent/DE102011085368A1/en
Publication of DE102011085368A1 publication Critical patent/DE102011085368A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/103—Fuse
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The rechargeable battery pack (1) has series circuits (2,3,8) that are switched in parallel to each other. The series circuits are provided with two battery cells (4) which are connected over a trunk line (5). A conductive connection portion (6) is provided between the trunk lines of the series circuits. An electrical backup portion (7) is provided in the conductive connection portion.

Description

Die Erfindung betrifft einen Akkupack gemäß Patentanspruch 1. The invention relates to a battery pack according to claim 1.

Stand der TechnikState of the art

Im Stand der Technik sind Akkupacks in den verschiedensten Kombinationen von Serien- und Parallelschaltung bekannt. Dabei werden Sicherungen verwendet, die einen Stromfluss in serieller Richtung auf einen Maximalwert begrenzen.Battery packs in various combinations of series and parallel connection are known in the prior art. Fuses are used that limit a current flow in the serial direction to a maximum value.

Offenbarung der Erfindung Disclosure of the invention

Die Aufgabe der Erfindung besteht darin, den Akkupack zu verbessern und insbesondere gegen eine Aufheizung zu schützen.The object of the invention is to improve the battery pack and in particular to protect against heating.

Die Aufgabe der Erfindung wird durch den Akkupack gemäß Patentanspruch 1 gelöst. Der beschriebene Akkupack weist den Vorteil auf, dass auch bei einer elektrisch kurz geschlossenen Zelle mit einem Kurzschluss eine parallel geschaltete Zelle nicht überhitzen kann. Dies wird dadurch erreicht, dass zwischen zwei parallel geschalteten Zellen eine elektrische Sicherung angeordnet ist. Auf diese Weise kann bei einem Kurzschluss in einer Zelle eine Überhitzung der korrekt funktionierenden, parallel angeordneten Zelle vermieden werden. Damit wird eine Übertemperatur der Zelle vermieden, so dass insbesondere Lithiumionenzellen nicht in Brand geraten oder explodieren.The object of the invention is achieved by the battery pack according to claim 1. The battery pack described has the advantage that even with an electrically short-circuited cell with a short circuit, a cell connected in parallel can not overheat. This is achieved by arranging an electrical fuse between two cells connected in parallel. In this way, in the event of a short circuit in a cell, overheating of the correctly functioning parallel cell can be avoided. This prevents over-temperature of the cell, so that in particular lithium-ion cells do not catch fire or explode.

In einer weiteren Ausführungsform ist die Sicherung als Schmelzsicherung ausgebildet. Die Verwendung der Schmelzsicherung ist ein einfaches und kostengünstiges Mittel, um einen maximalen Stromfluss zu begrenzen. In a further embodiment, the fuse is designed as a fuse. The use of the fuse is a simple and inexpensive means to limit maximum current flow.

In einer weiteren Ausführungsform ist die Sicherung in Form eines dünnen Metallstreifens, insbesondere als Draht ausgebildet. Dadurch wird eine einfache und kostengünstige Sicherung bereitgestellt.In a further embodiment, the fuse is in the form of a thin metal strip, in particular as a wire. This provides a simple and inexpensive backup.

In einer weiteren Ausführungsform ist die leitende Verbindung mit der Sicherung auf einer Platine integriert. Beispielsweise kann eine Leiterbahn der Platine als Schmelzsicherung verwendet werden. Somit ist eine kostengünstige Ausbildung der Sicherung möglich. In a further embodiment, the conductive connection with the fuse is integrated on a circuit board. For example, a conductor track of the board can be used as a fuse. Thus, a cost-effective training of the fuse is possible.

In einer weiteren Ausbildungsform ist die Sicherung zwischen zwei Zellverbinder angeordnet, die wenigstens zwei Zellen elektrisch leitend parallel schaltet. Damit ist eine kompakte und einfache Ausführung des Akkupacks möglich.In a further embodiment, the fuse between two cell connectors is arranged, which switches at least two cells electrically conductive in parallel. This makes a compact and simple design of the battery pack possible.

Vorzugsweise ist die Sicherung mit dem Zellverbinder einteilig ausgebildet. Die Erfindung wird im Folgenden anhand der Figuren näher erläutert. Es zeigenPreferably, the fuse is integrally formed with the cell connector. The invention will be explained in more detail below with reference to FIGS. Show it

1 eine erste Ausführungsform eines Akkupacks, 1 a first embodiment of a battery pack,

2 eine zweite Ausführungsform eines Akkupacks, und 2 a second embodiment of a battery pack, and

3 eine schematische Darstellung eines Akkupacks mit Zellverbindern. 3 a schematic representation of a battery pack with cell connectors.

1 zeigt in einer schematischen Darstellung einen Akkupack 1 mit zwei Serienschaltungen 2, 3 von jeweils vier Batteriezellen, im Folgenden als Zellen 4 bezeichnet. Der Akkupack 1 weist einen ersten und einen zweiten elektrischen Anschluss 9, 10 auf. Die in einer Serienschaltung 2, 3 angeordneten Zellen 4 sind jeweils über eine Verbindungsleitung 5 miteinander verbunden. Jeweils zwei Verbindungsleitungen 5 sind über eine elektrische Leitung 6 miteinander verbunden. In der elektrischen Leitung 6 ist eine elektrische Sicherung 7 integriert. Auf diese Weise sind in dem dargestellten Ausführungsbeispiel alle Verbindungsleitungen 5 der ersten Serienschaltung 2 jeweils über eine Sicherung 7 mit den entsprechenden Verbindungsleitungen 5 der zweiten Serienschaltung 3 verbunden. Abhängig von der gewählten Ausführungsform kann auch nur ein Teil der Verbindungsleitungen 5 der Serienschaltungen 2, 3 über eine Sicherung 7 verbunden sein. 1 shows a schematic representation of a battery pack 1 with two series connections 2 . 3 each of four battery cells, hereinafter referred to as cells 4 designated. The battery pack 1 has a first and a second electrical connection 9 . 10 on. The in a series connection 2 . 3 arranged cells 4 are each via a connecting line 5 connected with each other. Two connecting cables each 5 are via an electrical line 6 connected with each other. In the electric wire 6 is an electrical fuse 7 integrated. In this way, in the illustrated embodiment, all connecting lines 5 the first series connection 2 each with a fuse 7 with the appropriate connecting lines 5 the second series circuit 3 connected. Depending on the chosen embodiment, only a part of the connecting lines 5 the series circuits 2 . 3 about a fuse 7 be connected.

2 zeigt eine weitere Ausführungsform eines Akkupacks, bei der zusätzlich zu der ersten oder zweiten Serienschaltung 2, 3 noch eine dritte Serienschaltung 8 von Zellen 4 vorgesehen ist, die parallel zu der ersten oder zweiten Serienschaltung 2, 3 angeordnet ist. In dieser Ausführungsform sind auch die Verbindungsleitungen 5 der dritten Serienschaltung 8 jeweils über eine Leitung 6 mit einer Sicherung 7 an die Verbindungsleitungen 5 der zweiten Serienschaltung 3 angeschlossen. 2 shows a further embodiment of a battery pack, in addition to the first or second series circuit 2 . 3 another third series connection 8th of cells 4 is provided, which is parallel to the first or second series circuit 2 . 3 is arranged. In this embodiment, the connecting lines are also 5 the third series connection 8th each via a line 6 with a fuse 7 to the connecting lines 5 the second series circuit 3 connected.

Abhängig von der gewählten Ausführungsform kann die Sicherung 7 beispielsweise als Schmelzsicherung ausgebildet sein. Als Schmelzsicherung kann beispielsweise ein dünner Metallstreifen, insbesondere ein Metalldraht verwendet werden. Depending on the chosen embodiment, the fuse 7 be designed for example as a fuse. As a fuse, for example, a thin metal strip, in particular a metal wire can be used.

In einer weiteren Ausführungsform kann die Sicherung 7 auf einer Platine des Akkupacks 1 angeordnet sein. Bei der Verwendung einer Platine kann die Sicherung 7 beispielsweise in Form einer Leiterbahn ausgebildet sein, die entsprechend dimensioniert ist, um als Schmelzsicherung zu dienen.In a further embodiment, the fuse 7 on a board of the battery pack 1 be arranged. When using a circuit board, the fuse 7 be formed for example in the form of a conductor, which is dimensioned accordingly to serve as a fuse.

In einer weiteren Ausführungsform kann die Schmelzsicherung in einen Zellverbinder integriert sein.In a further embodiment, the fuse may be integrated into a cell connector.

3 zeigt eine Anordnung mit vier Zellen 15, 16, 17, 18, die über einen Zellverbinder 11 elektrisch leitend miteinander verbunden sind. Der Zellverbinder 11 weist einen ersten und einen zweiten Verbindungsteil 12, 13 auf, die über ein Verbindungsstück 14 miteinander verbunden sind. Das Verbindungsstück 14 weist einen entsprechend dünnen Querschnitt auf, um als Sicherung zu dienen. Das erste Teilstück 12 ist mit einem Minuspol der ersten Zelle 15 und mit einem Pluspol der zweiten Zelle 16 verbunden. Die erste und die zweite Zelle 15, 16 sind in Serie geschaltet und Teil der ersten Serienschaltung 2, wie z.B. in 1 oder 2 dargestellt ist. Das zweite Teilstück 13 ist mit einem Minuspol der dritten Zelle 17 und einem Pluspol der vierten Zelle 18 verbunden. Die dritte und die vierte Zelle 17, 18 sind in Serie geschaltet und Teil einer zweiten Serienschaltung 3, wie z.B. in 1 oder 2 dargestellt ist. Das erste und das zweite Teilstück 12, 13 stellen somit eine Verbindungsleitung 5 gemäß der Ausführung der 1 dar. Das Verbindungsstück 14 stellt eine Sicherung dar. Abhängig von der gewählten Ausführungsform kann das Verbindungsstück 14 auch als Schmelzsicherung ausgebildet sein. Zudem kann das Verbindungsstück 14 als separater Draht ausgebildet sein, der mit dem ersten und dem zweiten Teilstück 12, 13 elektrisch leitend verbunden ist. In einer weiteren Ausbildungsform können das erste und das zweite Teilstück 12, 13 mit dem Verbindungsstück 14 einteilig ausgebildet sein. Insbesondere kann der Zellverbinder 11 aus einem metallisch leitenden Blech herausgestanzt sein. Damit ist eine besonders günstige und einfache Herstellung des Zellverbinders möglich. 3 shows an arrangement with four cells 15 . 16 . 17 . 18 that have a cell connector 11 electrically conductively connected to each other. The cell connector 11 has a first and a second connecting part 12 . 13 on that over a connector 14 connected to each other. The connector 14 has a correspondingly thin cross-section to serve as a fuse. The first part 12 is with a negative pole of the first cell 15 and with a positive pole of the second cell 16 connected. The first and the second cell 15 . 16 are connected in series and part of the first series connection 2 , such as in 1 or 2 is shown. The second part 13 is with a negative pole of the third cell 17 and a positive pole of the fourth cell 18 connected. The third and the fourth cell 17 . 18 are connected in series and part of a second series connection 3 , such as in 1 or 2 is shown. The first and the second part 12 . 13 thus provide a connection line 5 according to the execution of 1 dar. The connector 14 represents a fuse. Depending on the chosen embodiment, the connector 14 also be designed as a fuse. In addition, the connector can 14 be formed as a separate wire, with the first and the second section 12 . 13 is electrically connected. In a further embodiment, the first and the second section 12 . 13 with the connector 14 be formed in one piece. In particular, the cell connector 11 be punched out of a metallically conductive sheet. For a particularly cheap and easy production of the cell connector is possible.

Claims (7)

Akkupack (1) mit wenigstens zwei Serienschaltungen (2, 3, 8) von Batteriezellen die parallel geschaltet sind, wobei jede Serienschaltung (2, 3, 8) wenigstens zwei Batteriezellen (4) aufweist, die über eine Verbindungsleitung (5) miteinander verbunden sind, wobei eine leitende Verbindung (6) zwischen den Verbindungsleitungen (5) der zwei Serienschaltungen (2, 3, 8) vorgesehen ist, dadurch gekennzeichnet, dass eine elektrische Sicherung (7) in der leitenden Verbindung (6) vorgesehen ist.Battery pack ( 1 ) with at least two series circuits ( 2 . 3 . 8th ) of battery cells connected in parallel, each series circuit ( 2 . 3 . 8th ) at least two battery cells ( 4 ), which via a connecting line ( 5 ), wherein a conductive connection ( 6 ) between the connecting lines ( 5 ) of the two series circuits ( 2 . 3 . 8th ), characterized in that an electrical fuse ( 7 ) in the conducting connection ( 6 ) is provided. Akkupack nach Anspruch 1, wobei die Sicherung als Schmelzsicherung ausgebildet ist.Battery pack according to claim 1, wherein the fuse is designed as a fuse. Akkupack nach einem der vorhergehenden Ansprüche, wobei die Sicherung als dünner Metallstreifen, insbesondere als Draht ausgebildet ist.Battery pack according to one of the preceding claims, wherein the fuse is designed as a thin metal strip, in particular as a wire. Akkupack nach einem der vorhergehenden Ansprüche, wobei die leitende Verbindung mit der Sicherung auf einer Platine integriert ist.Battery pack according to one of the preceding claims, wherein the conductive connection with the fuse is integrated on a circuit board. Akkupack nach einem der vorhergehenden Ansprüche, wobei die Sicherung (14) in einen Zellverbinder (11) integriert ist, der wenigstens zwei Batteriezellen (15, 16, 17, 18) miteinander elektrisch leitend verbindet.Battery pack according to one of the preceding claims, wherein the fuse ( 14 ) in a cell connector ( 11 ), the at least two battery cells ( 15 . 16 . 17 . 18 ) electrically conductively connects to each other. Akkupack nach Anspruch 5, wobei die Sicherung (14) einteilig mit dem Zellverbinder (11) ausgebildet ist.Battery pack according to claim 5, wherein the fuse ( 14 ) in one piece with the cell connector ( 11 ) is trained. Akkupack nach Anspruch 6, wobei die Sicherung und der Zellverbinder (11) aus einem Blech gestanzt sind.Battery pack according to claim 6, wherein the fuse and the cell connector ( 11 ) are punched from a sheet.
DE102011085368A 2011-10-28 2011-10-28 Rechargeable battery pack has electrical backup portion that is provided in conductive connection portion which is provided between trunk lines of series circuits provided with two battery cells that are connected over trunk line Withdrawn DE102011085368A1 (en)

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DE102011085368A DE102011085368A1 (en) 2011-10-28 2011-10-28 Rechargeable battery pack has electrical backup portion that is provided in conductive connection portion which is provided between trunk lines of series circuits provided with two battery cells that are connected over trunk line

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DE102011085368A DE102011085368A1 (en) 2011-10-28 2011-10-28 Rechargeable battery pack has electrical backup portion that is provided in conductive connection portion which is provided between trunk lines of series circuits provided with two battery cells that are connected over trunk line

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020110012A1 (en) 2020-04-09 2021-10-14 Bayerische Motoren Werke Aktiengesellschaft Electric energy storage device and motor vehicle
DE102021106344A1 (en) 2021-03-16 2022-09-22 Bayerische Motoren Werke Aktiengesellschaft Round cell battery module comprising round cell battery units and a cell connection device, vehicle and cell connection device
DE102022115344A1 (en) 2022-06-21 2023-12-21 Bayerische Motoren Werke Aktiengesellschaft Cell contacting system and method for producing a cell contacting system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6051955A (en) * 1997-05-19 2000-04-18 Fujitsu Limited Protection circuit and battery unit
DE10118773A1 (en) * 2000-04-17 2001-11-22 Sanyo Electric Co Fuse manufacturing method for battery pack, involves arranging connection pieces which are welded using stainless steel wire, linearly such that steel wire is bent near the edges
EP1780819A1 (en) * 2005-10-31 2007-05-02 Black & Decker, Inc. Cell connection straps for battery cells of a battery pack
WO2011003924A1 (en) * 2009-07-08 2011-01-13 Commissariat à l'énergie atomique et aux énergies alternatives Low-loss storage battery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6051955A (en) * 1997-05-19 2000-04-18 Fujitsu Limited Protection circuit and battery unit
DE10118773A1 (en) * 2000-04-17 2001-11-22 Sanyo Electric Co Fuse manufacturing method for battery pack, involves arranging connection pieces which are welded using stainless steel wire, linearly such that steel wire is bent near the edges
EP1780819A1 (en) * 2005-10-31 2007-05-02 Black & Decker, Inc. Cell connection straps for battery cells of a battery pack
WO2011003924A1 (en) * 2009-07-08 2011-01-13 Commissariat à l'énergie atomique et aux énergies alternatives Low-loss storage battery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020110012A1 (en) 2020-04-09 2021-10-14 Bayerische Motoren Werke Aktiengesellschaft Electric energy storage device and motor vehicle
DE102021106344A1 (en) 2021-03-16 2022-09-22 Bayerische Motoren Werke Aktiengesellschaft Round cell battery module comprising round cell battery units and a cell connection device, vehicle and cell connection device
DE102022115344A1 (en) 2022-06-21 2023-12-21 Bayerische Motoren Werke Aktiengesellschaft Cell contacting system and method for producing a cell contacting system

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